Open the geometry sketchpad, click the [Custom Tools] button in the left sidebar, and select [Solid Geometry] - Regular Hexahedron from the pop-up shortcut tool menu, as shown in the figure.
Draw a regular hexahedron. Click once on the canvas to determine the position of a vertex of the regular hexahedron, drag the mouse to adjust the size of the regular hexahedron, and click again to draw the last vertex. Then you can draw the regular hexahedron, as shown in the figure.
Adjust the regular hexahedron. Select the [Move Arrow Tool] on the sidebar, press and hold one of the red fixed points of the regular hexahedron and drag or rotate it to adjust the size of the regular tetrahedron and rotate it around the other red vertex of the regular tetrahedron.
Select the [Move Arrow Tool] on the sidebar, press and hold another red fixed point of the regular hexahedron, drag or rotate it to adjust the size of the regular tetrahedron and select it around the regular tetrahedron. The red vertex rotates.
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